Where is will in the general structure of activity?

...how to relate this general activity structure to such traditional psychic processes as perception, imagination, memory, thinking, feelings, and will. Can these be considered as components of the general structure of activity, along with problems and actions? Or should they be considered as independent kinds of activity?... In my opinion, it is not correct to consider traditional cognitive processes as different forms of activity. They are no more than specific components of a general activity structure that promote the realization of its other components. For example, perception and thinking help a person to single out and concretize the conditions in which a sensory or cognitive problem can be solved and to choose the methods of its solution. But the problem itself is the component of some integral activity, for exampley, play, art, or learning.

Davydod, The content and unsolved problems of activity theory, p. 45